Do tax resale certificates expire in Texas?
Usually, no. A Texas blanket resale certificate does not have a fixed expiration date. A seller may accept a blanket resale certificate when the customer purchases exclusively for resale, and that blanket certificate remains valid until the purchaser revokes it in writing.
However, "active" doesn't signify "permanent". For a certificate to support a tax-free resale sale, it should be properly completed and include the purchaser’s Texas permit number or a qualifying out-of-state registration number when applicable.
When does a Texas resale certificate stop being valid?
A seller should stop relying on the certificate when it knows, or has reason to know, the purchase is not for resale. In the case a buyer’s permit is revoked or they start buying items for their own office use — rather than for resale — the certificate is no longer valid for those purchases.
As a seller, an updated form should be asked for if:
The buyer’s sales tax permit is no longer active
The buyer cancels the certificate in writing
The buyer switches industries — e.g., a toy shop starts buying lumber
The form is missing a signature or a taxpayer ID
The buyer is clearly purchasing equipment or supplies for their own internal use
What is the rule for blanket certificates in Texas?
Texas allows "blanket" certificates in order to save time. In other words, a buyer can present one form to cover all future purchases of a similar type. It is possible to rely on this form until the buyer tells you otherwise.
Note for new businesses: In case a buyer’s permit is still "pending," the certificate is only good for 60 days. Once that window closes, a new certificate featuring their permanent permit number is required.
| Scenario | Is the certificate still good? |
|---|---|
| Active permit + buying items to resell | Yes |
| Buyer canceled the certificate in writing | No |
| Permit application still pending after 60 days | No |
| Buying items for internal office use | No |
Why does this matter for Texas sellers and buyers?
In Texas, a properly completed resale certificate is a key record supporting why the seller did not charge sales tax. In the case of not charging sales tax and not having a valid certificate to show why, the state may hold you responsible for that unpaid tax later.
Remember: A permit number written on a sticky note isn't enough. A permit number alone is not enough; the seller should keep a properly completed resale certificate in its records. For Austin business owners, staying safe is a 3-step process:
Collect a finished Form 01-339
Verify that the items being bought actually fit the buyer’s business
Store the certificate with the invoices for at least 4 years
How can Dimov Partners help?
Managing sales tax paperwork might feel like a full-time job you didn't ask for. Dimov Partners assists Austin businesses in cleaning up the records and closing any gaps before the state comes knocking. No matter if you need to fix the filing system or confirm if a specific purchase qualifies for an exemption, we’re here to help. Reach out to us today for 70+ dedicated tax services.